Hello all!
I've recently embarked on a little project... I intend to build my own KVM switch from scratch. Part of this device's functionality is to switch a single monitor between two inputs (i.e. two computers.), using single-link dvi-d cables.
Now, I've run into a little snag. Obviously, the first step in building a DVI switch is to successfully interface the DVI cables with my project. I purchased these i/o connectors from mouser and soldered leads to them.
Before I connected them to any kind of circuitry, I wanted to first see if a monitor signal survived what I had done so far. Well, it couldn't. Pictures seem to tell the story better:
This was my basic setup. I just have two i/o connectors with all the corresponding pins connected. On the left is the dvi cable from the computer, and on the right is the dvi cable going to the monitor.
**broken link removed**
Just let me say that I've spent at least an hour and a half double and triple checking for continuity and shorts. Everything looks perfect on the volt meter, but something isn't working with high amounts of dvi data.
I'll clarify a little. If I have my computer set to my usual 1920x1200 resolution, my little setup produces a "signal out of range" message on my monitor. So I decided to try a lower resolution, and hence, it works. Here's a little illustration of what happens as I try to increase the resolution:
1152x864:
**broken link removed**
1280x1024:
**broken link removed**
1600x900:
**broken link removed**
1600x1200:
**broken link removed**
With that last resolution (1600x1200), the monitor displayed that for about a second, then went to black. When I try to get to 1920x1200, my monitor displays a "signal out of range" message.
My dillema is obvious. I don't intend to admit defeat, though.
Somehow my setup can't handle the data throughput of higher resolutions, which also makes me doubt the integrity of even a 1024x768 signal. My guess is that there's maybe some type of interference going on or degradation of the signal as it travels through my expert soldering joints.
One of the tests I did do was check to see that if I stuck 6.3v in one end, that I got exactly that voltage out the other end. That all went fine. Like I said, whatever this problem is, it isn't going to be found with a voltmeter.
I'd greatly appreciate any help you guys can give me. Thanks for reading...
qa9b
I've recently embarked on a little project... I intend to build my own KVM switch from scratch. Part of this device's functionality is to switch a single monitor between two inputs (i.e. two computers.), using single-link dvi-d cables.
Now, I've run into a little snag. Obviously, the first step in building a DVI switch is to successfully interface the DVI cables with my project. I purchased these i/o connectors from mouser and soldered leads to them.
Before I connected them to any kind of circuitry, I wanted to first see if a monitor signal survived what I had done so far. Well, it couldn't. Pictures seem to tell the story better:
This was my basic setup. I just have two i/o connectors with all the corresponding pins connected. On the left is the dvi cable from the computer, and on the right is the dvi cable going to the monitor.
**broken link removed**
Just let me say that I've spent at least an hour and a half double and triple checking for continuity and shorts. Everything looks perfect on the volt meter, but something isn't working with high amounts of dvi data.
I'll clarify a little. If I have my computer set to my usual 1920x1200 resolution, my little setup produces a "signal out of range" message on my monitor. So I decided to try a lower resolution, and hence, it works. Here's a little illustration of what happens as I try to increase the resolution:
1152x864:
**broken link removed**
1280x1024:
**broken link removed**
1600x900:
**broken link removed**
1600x1200:
**broken link removed**
With that last resolution (1600x1200), the monitor displayed that for about a second, then went to black. When I try to get to 1920x1200, my monitor displays a "signal out of range" message.
My dillema is obvious. I don't intend to admit defeat, though.
Somehow my setup can't handle the data throughput of higher resolutions, which also makes me doubt the integrity of even a 1024x768 signal. My guess is that there's maybe some type of interference going on or degradation of the signal as it travels through my expert soldering joints.
One of the tests I did do was check to see that if I stuck 6.3v in one end, that I got exactly that voltage out the other end. That all went fine. Like I said, whatever this problem is, it isn't going to be found with a voltmeter.
I'd greatly appreciate any help you guys can give me. Thanks for reading...
qa9b